/*----------------------------------------------------------------------------*-
					=================================
					Y Sever Includes - Gang Zone Core
					=================================
Description:
	Handles gang warfare and zones.  Does NOT use the areas code as all areas
	must be square and it's simpler to use an internal system and faster.
Legal:
	Copyright (C) 2007 Alex "Y_Less" Cole

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
	MA 02110-1301, USA.
Version:
	0.1
Changelog:
	03/08/07:
		Updated timer system.
	29/07/07:
		Added initial function and file documentation.
	23/07/07:
		First version.
Functions:
	Public:
		Zone_Loop - Main processing loop.
	Core:
		Zone_OnPlayerLeaveGroup - Called when a player joins a group.
		Zone_OnPlayerJoinGroup - Called when a player leaves a group.
		Zone_Zone - Sets up the script.
		Zone_OnPlayerConnect - Called when a player connects.
		Zone_OnPlayerDisconnect - Called when a player disconnects.
		Zone_OnPlayerDeath - Called when a player dies.
	Stock:
		Zone_Remove - Removes a zone from the system.
		Zone_SetOwner - Sets the group owner of a system.
		Zone_Protect - Sets a zone as protected or unprotected.
		Zone_Add - Adds a zone to the system.
		Zone_GetPlayerZone - Gets a player's current zone.
	Static:
		Zone_StartCapture - Triggers a gang war.
		Zone_CancelCapture - Ends a gang war by loss.
	Inline:
		Zone_IsActive - Checks a valid zone is active.
		Zone_IsValid - Checks a zone is valid and active.
		Zone_IsInArea - Checks a point is in a zone.
		Zone_GetOwner - Gets the group who own a zone.
		Zone_GetAttacker - Gets the group attacking a zone.
		Zone_CalculateElapse - Calculates the elapsed time for capture.
		Zone_GetGangZone - Gets a real pointer of a zone.
		Zone_IsProtected - Checks if a zone is protected.
		Zone_GetColour - Gets the colour of a zone.
		Zone_OnPlayerEnterZone - Calls callbacks.
		Zone_OnPlayerLeaveZone - Calls callbacks.
	API:
		-
Callbacks:
	-
Definitions:
	NO_ZONE - Fail return.
	ZONE_NO_OWNER - Representation for no current zone owner.
	ZONE_NO_ATTACKER - Representation for no current attacker.
	ZONE_LOOP_GRANULARITY - Number of times a second to call the main loop.
	ZONE_TIME_MODIFIER - Modifier for the time elapsed based on players.
	MAX_ZONES - Maximum number of zones handled by the script.
	ZONE_CAPTURE_TIME - Base time for capturing a zone in a war.
	ZONE_TRIGGER_TIME - Base time for triggering a zone war.
	ZONE_KILL_BONUS - Time bonus for killing someone.
Enums:
	e_ZONE_FLAGS
	E_ZONE_DATA
Macros:
	-
Tags:
	-
Variables:
	Global:
		-
	Static:
		YSI_g_sGangZones - Data on one zone.
		YSI_g_sPlayerZone - Player's current zones.
		YSI_g_sGangCounts - Number of group members in a zone.
		YSI_g_sGangTimes - Time left for a group for a zone for capture.
Commands:
	-
Compile options:
	-
Operators:
	-
-*----------------------------------------------------------------------------*/

#if !defined ZONE_LOOP_GRANULARITY
	#define ZONE_LOOP_GRANULARITY 1
#endif

#if !defined ZONE_TIME_MODIFIER
	#define ZONE_TIME_MODIFIER 2
#endif

#if !defined MAX_ZONES
	#define MAX_ZONES 512
#endif

#if !defined ZONE_CAPTURE_TIME
	#define ZONE_CAPTURE_TIME 180000
#endif

#if !defined ZONE_TRIGGER_TIME
	#define ZONE_TRIGGER_TIME 180000
#endif

#if !defined ZONE_KILL_BONUS
	#define ZONE_KILL_BONUS 60000
#endif

#define NO_ZONE -1
#define ZONE_NO_OWNER (_:e_ZONE_FLAGS_OWNER)
#define ZONE_NO_ATTACKER (_:e_ZONE_FLAGS_ATTACK >> 14)

enum e_ZONE_FLAGS (<<= 1)
{
	e_ZONE_FLAGS_OWNER = 0x00003FFF,
	e_ZONE_FLAGS_ATTACK = 0x0FFFC000,
	e_ZONE_FLAGS_ACTIVE = 0x10000000,
	e_ZONE_FLAGS_PROTECTED,
	e_ZONE_FLAGS_CONTENDED
}

enum E_ZONE_DATA
{
	Float:E_ZONE_DATA_MIN_X,
	Float:E_ZONE_DATA_MIN_Y,
	Float:E_ZONE_DATA_MAX_X,
	Float:E_ZONE_DATA_MAX_Y,
	e_ZONE_FLAGS:E_ZONE_DATA_FLAGS,
	E_ZONE_DATA_TIME,
	E_ZONE_DATA_POINTER,
	E_ZONE_DATA_COLOUR
}

static
	YSI_g_sGangZones[MAX_ZONES][E_ZONE_DATA],
	YSI_g_sPlayerZone[MAX_PLAYERS] = {NO_ZONE, ...},
	YSI_g_sGangCounts[MAX_ZONES][MAX_GROUPS],
	YSI_g_sGangTimes[MAX_ZONES][MAX_GROUPS];

forward Zone_Loop();

/*----------------------------------------------------------------------------*-
Function:
	Zone_IsActive
Params:
	zoneid - Zone to check activity of.
Return:
	-
Notes:
	Checks a valid zone to see if it is active.
-*----------------------------------------------------------------------------*/

#define Zone_IsActive(%1) \
	(YSI_g_sGangZones[(%1)][E_ZONE_DATA_FLAGS] & e_ZONE_FLAGS_ACTIVE)

/*----------------------------------------------------------------------------*-
Function:
	Zone_IsValid
Params:
	zoneid - A reference.
Return:
	-
Notes:
	Checks the passed reference is a valid, active xone.
-*----------------------------------------------------------------------------*/

#define Zone_IsValid(%1) \
	((%1) >= 0 && (%1) < MAX_ZONES && Zone_IsActive((%1)))

/*----------------------------------------------------------------------------*-
Function:
	Zone_IsInArea
Params:
	zoneid - Zone to check for.
	Float:x - X point to check.
	Float:y - Y point to check.
Return:
	-
Notes:
	Checks a given x,y point is within a specified zone's boundary.
-*----------------------------------------------------------------------------*/

#define Zone_IsInArea(%1,%2,%3) \
	( \
		((%2) > YSI_g_sGangZones[(%1)][E_ZONE_DATA_MIN_X]) && \
		((%3) > YSI_g_sGangZones[(%1)][E_ZONE_DATA_MIN_Y]) && \
		((%2) < YSI_g_sGangZones[(%1)][E_ZONE_DATA_MAX_X]) && \
		((%3) < YSI_g_sGangZones[(%1)][E_ZONE_DATA_MAX_Y]) \
	)

/*----------------------------------------------------------------------------*-
Function:
	Zone_GetOwner
Params:
	zoneid - Zone to get the owner of.
Return:
	-
Notes:
	-
-*----------------------------------------------------------------------------*/

#define Zone_GetOwner(%1) \
	(_:(YSI_g_sGangZones[(%1)][E_ZONE_DATA_FLAGS] & e_ZONE_FLAGS_OWNER))

/*----------------------------------------------------------------------------*-
Function:
	Zone_GetAttacker
Params:
	zoneid - Zone to get attacker of.
Return:
	-
Notes:
	-
-*----------------------------------------------------------------------------*/

#define Zone_GetAttacker(%1) \
	(_:(YSI_g_sGangZones[(%1)][E_ZONE_DATA_FLAGS] & e_ZONE_FLAGS_ATTACK) >> 14)

/*----------------------------------------------------------------------------*-
Function:
	Zone_CalculateElapse
Params:
	playercount - Number of players from a gang in a zone.
	elapsedtime - Milliseconds since the last check.
Return:
	-
Notes:
	Calculates the relative elapsed time for a given number of players.  The
	more players from one gang there are in one zone the faster the time to
	capture will pass, however it's a sliding scale, the more players you get
	the less of a difference it will make.  Current values (to 2dp):
	
	1 player   - 0.00 (i.e. infinate capture time)
	2 players  - 0.67 - 0.67 difference
	3 players  - 1.14 - 0.47
	4 players  - 1.50 - 0.36
	5 players  - 1.78 - 0.28
	6 players  - 2.00 - 0.22
	7 players  - 2.18 - 0.18
	8 players  - 2.33 - 0.15
	9 players  - 2.46 - 0.13
	10 players - 2.57 - 0.11
-*----------------------------------------------------------------------------*/

#define Zone_CalculateElapse(%1,%2) \
	(floatround(float((%2)) * (((-10.0 / (float((%1)) + 4.0)) + 2.0) * ZONE_TIME_MODIFIER)))

/*----------------------------------------------------------------------------*-
Function:
	Zone_GetGangZone
Params:
	zoneid - Zone to get the pointer for.
Return:
	-
Notes:
	Gets the pointer to the visual zone for this slot.
-*----------------------------------------------------------------------------*/

#define Zone_GetGangZone(%1) \
	(YSI_g_sGangZones[(%1)][E_ZONE_DATA_POINTER])

/*----------------------------------------------------------------------------*-
Function:
	Zone_IsProtected
Params:
	zoneid - Zone to check.
Return:
	-
Notes:
	Checks to see if a zone can be captured or not.
-*----------------------------------------------------------------------------*/

#define Zone_IsProtected(%1) \
	(YSI_g_sGangZones[(%1)][E_ZONE_DATA_FLAGS] & e_ZONE_FLAGS_PROTECTED)

/*----------------------------------------------------------------------------*-
Function:
	Zone_GetColour
Params:
	zoneid - Zone to get the colour of.
Return:
	-
Notes:
	-
-*----------------------------------------------------------------------------*/

#define Zone_GetColour(%1) \
	(YSI_g_sGangZones[(%1)][E_ZONE_DATA_COLOUR])

/*----------------------------------------------------------------------------*-
Function:
	Zone_OnPlayerEnterZone
Params:
	playerid - Player who entered a zone.
	zoneid - Zone they entered.
Return
	-
Notes:
	Calls the callback for entering zones.
-*----------------------------------------------------------------------------*/

#define Zone_OnPlayerEnterZone(%1,%2) \
	CallRemoteFunction("OnPlayerEnterZone", "ii", (%1), (%2))

/*----------------------------------------------------------------------------*-
Function:
	Zone_OnPlayerLeaveZone
Params:
	playerid - Player who left a zone.
	zoneid - Zone they left.
Return:
	-
Notes:
	Calls the callback for leaving zones.
-*----------------------------------------------------------------------------*/

#define Zone_OnPlayerLeaveZone(%1,%2) \
	CallRemoteFunction("OnPlayerLeaveZone", "ii", (%1), (%2))

/*----------------------------------------------------------------------------*-
Function:
	Zone_Zone
Params:
	-
Return:
	-
Notes:
	Constructor.  Starts the loop.
-*----------------------------------------------------------------------------*/

Zone_Zone()
{
	static
		timer;
	if (!timer)
	{
		timer = Timer_Add("Zone_Loop", ZONE_LOOP_GRANULARITY);
	}
	return 1;
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_Add
Params:
	Float:minx - Lower edge of the zone on the x axis.
	Float:miny - Lower edge of the zone on the y axis.
	Float:maxx - Upper edge of the zone on the x axis.
	Float:maxy - Upper edge of the zone on the y axis.
Return:
	Handle to the zone data.
Notes:
	Creates a zone if there are any slots left and a visual zone can be
	created.  Sets the zone colour to a pale black to start with.
-*----------------------------------------------------------------------------*/

stock Zone_Add(Float:minx, Float:miny, Float:maxx, Float:maxy)
{
	new
		zone;
	while (zone < MAX_ZONES)
	{
		if (!Zone_IsActive(zone)) break;
		zone++;
	}
	if (zone == MAX_ZONES) return NO_ZONE;
	new
		pointer = GangZoneCreate(minx, miny, maxx, maxy);
	if (pointer == NO_ZONE) return NO_ZONE;
	YSI_g_sGangZones[zone][E_ZONE_DATA_POINTER] = pointer;
	YSI_g_sGangZones[zone][E_ZONE_DATA_MIN_X] = minx;
	YSI_g_sGangZones[zone][E_ZONE_DATA_MIN_Y] = miny;
	YSI_g_sGangZones[zone][E_ZONE_DATA_MAX_X] = maxx;
	YSI_g_sGangZones[zone][E_ZONE_DATA_MAX_Y] = maxy;
	YSI_g_sGangZones[zone][E_ZONE_DATA_FLAGS] = e_ZONE_FLAGS_ACTIVE | e_ZONE_FLAGS_OWNER | e_ZONE_FLAGS_ATTACK;
	YSI_g_sGangZones[zone][E_ZONE_DATA_COLOUR] = 0x33;
	return zone;
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_OnPlayerConnect
Params:
	playerid - Player who connected.
Return:
	-
Notes:
	Called when a player connects.  Sets up existing zones for the player.
-*----------------------------------------------------------------------------*/

Zone_OnPlayerConnect(playerid)
{
	for (new i = 0; i < MAX_ZONES; i++)
	{
		if (Zone_IsActive(i))
		{
			GangZoneShowForPlayer(playerid, Zone_GetGangZone(i), Zone_GetColour(i));
		}
	}
	return 1;
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_OnPlayerDisconnect.
Params:
	playerid - Player who left.
	reason - Why they left.
Return:
	-
Notes:
	Called when a player leaves, removes the player from counting towards any
	current captures in progress.
-*----------------------------------------------------------------------------*/

Zone_OnPlayerDisconnect(playerid, reason)
{
	new
		curzone = YSI_g_sPlayerZone[playerid];
	if (curzone != NO_ZONE)
	{
		new
			gang = Group_GetGangGroup(playerid);
		if (gang != -1)
		{
			YSI_g_sGangCounts[curzone][gang]--;
		}
	}
	YSI_g_sPlayerZone[playerid] = NO_ZONE;
	return 1;
	#pragma unused reason
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_OnPlayerDeath
Params:
	playerid - Player who died.
	killerid - Player who killed them.
	reason - How they were killed.
Return:
	-
Notes:
	Rewards the killer's team if both players were in a zone and one player
	was in the zone owner's team.
-*----------------------------------------------------------------------------*/

Zone_OnPlayerDeath(playerid, killerid, reason)
{
	if (killerid == INVALID_PLAYER_ID) return 0;
	new
		zone = YSI_g_sPlayerZone[playerid];
	if (Zone_IsValid(zone) && !Zone_IsProtected(zone) && zone == YSI_g_sPlayerZone[killerid])
	{
		new
			owner = Zone_GetOwner(zone);
		if (owner != ZONE_NO_OWNER) 
		{
			new
				killergroup = Group_GetGangGroup(killerid),
				playergroup = Group_GetGangGroup(playerid);
			if (playergroup == owner)
			{
				YSI_g_sGangTimes[zone][killergroup] -= ZONE_KILL_BONUS;
			}
			else if (killergroup == owner)
			{
				YSI_g_sGangTimes[zone][playergroup] += ZONE_KILL_BONUS;
			}
			return 1;
		}
	}
	return 0;
	#pragma unused reason
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_Remove
Params:
	zoneid - Zone to remove.
Return:
	-
Notes:
	Removes a zone from the system.
-*----------------------------------------------------------------------------*/

stock Zone_Remove(zoneid)
{
	if (Zone_IsValid(zoneid))
	{
		GangZoneHideForAll(Zone_GetGangZone(zoneid));
		YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] = e_ZONE_FLAGS:0;
	}
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_Protect
Params:
	zoneid - Zone to protect.
	protect - Whether to protect or unprotect the zone.
Return:
	-
Notes:
	Stops or allows the zone to be captured.
-*----------------------------------------------------------------------------*/

stock Zone_Protect(zoneid, protect)
{
	if (Zone_IsValid(zoneid))
	{
		if (protect) YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] |= e_ZONE_FLAGS_PROTECTED;
		else YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] &= ~e_ZONE_FLAGS_PROTECTED;
	}
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_SetOwner
Params:
	zoneid - Zone to set owner for.
	group - Group to assign as owner.
Return:
	-
Notes:
	Sets a zone's owner, either by manual call or capture.
-*----------------------------------------------------------------------------*/

stock Zone_SetOwner(zoneid, group)
{
	if (Zone_IsValid(zoneid))
	{
		YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] &= ~e_ZONE_FLAGS_OWNER;
		YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] |= (e_ZONE_FLAGS:group & e_ZONE_FLAGS_OWNER) | e_ZONE_FLAGS_ATTACK;
		GangZoneStopFlashForAll(Zone_GetGangZone(zoneid));
		YSI_g_sGangZones[zoneid][E_ZONE_DATA_COLOUR] = Group_GetColour(group) & 0xFFFFFF00;
		YSI_g_sGangZones[zoneid][E_ZONE_DATA_COLOUR] |= 0x33;
		GangZoneShowForAll(Zone_GetGangZone(zoneid), Zone_GetColour(zoneid));
	}
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_Loop
Params:
	-
Return:
	-
Notes:
	Does the main processing for the zone system.  There are two main parts to
	the loop.
	
	The first part handles individual players, checking what zone they are in
	by first checking if they have left the zone there were in previously and
	if so looping through the other zones to see where they are.
	
	The second part handles captures.  After the first part has sorted out who
	is where and what groups they're in the second part processes that
	information and calculates capture times based on numbers of people in
	zones.
	
	To capture a zone you must first trigger a gang war, this is done by
	holding a zone for a certain amount of time (varies depending on the
	number of people in the zone) or killing people in the zone (knocks time
	off the hold time).  If there is only one person in the zone the time
	won't decrease but will not reset either, if there are no people (from your
	group) in the zone your group's capture time will reset.
	
	If the zone is unowned triggering a gang war will award you the zone
	instantly.  If it is owner a war will trigger.  A war is very similar to
	the trigger but other gangs can't continue triggering while a war is in
	progress and the defenders now count for something.  The defenders have
	the slight upper hand in a war, if there is no-one at all in the zone the
	defender's will slowly increase towards victory and the attacker's time
	will decrease.  If there is one attacker the time will not move either way.
	Player values above those two (or 1 defender, no attackers) will move the
	time in one team or another's direction.  The defenders count as having one
	more man than they actually have because they're defenders so 4 attackers
	vs. 3 defenders is a stalemate and the time will not move either way.  You
	can get bonus time by killing the opposition and this gives you far more
	than just standing there so 1 attacker can still take a zone, even against
	superior numbers.
	
	Only kills made when both participants are in the contended zone count.
-*----------------------------------------------------------------------------*/

public Zone_Loop()
{
	static
		sCheck = ZONE_LOOP_GRANULARITY;
	new
		Bit:bGangTriggered[Bit_Bits(MAX_GROUPS)];
	sCheck--;
	foreach (Player, playerid)
	{
		new
			gang = Group_GetGangGroup(playerid);
		if (gang != -1)
		{
			new
				Float:x,
				Float:y,
				Float:z,
				curzone = YSI_g_sPlayerZone[playerid];
			GetPlayerPos(playerid, x, y, z);
			if (curzone >= 0 && curzone < MAX_ZONES)
			{
				if (Zone_IsActive(curzone) && Zone_IsInArea(curzone, x, y))
				{
					if (!sCheck) Bit_Set(bGangTriggered, gang, 1, Bit_Bits(MAX_GROUPS));
					continue;
				}
				Zone_OnPlayerLeaveZone(playerid, curzone);
				YSI_g_sGangCounts[curzone][gang]--;
				YSI_g_sPlayerZone[playerid] = NO_ZONE;
			}
			for (new zoneid = 0; zoneid < MAX_ZONES; zoneid++)
			{
				if (Zone_IsActive(zoneid) && Zone_IsInArea(zoneid, x, y))
				{
					YSI_g_sPlayerZone[playerid] = zoneid;
					Zone_OnPlayerEnterZone(playerid, zoneid);
					YSI_g_sGangCounts[zoneid][gang]++;
					if (!sCheck) Bit_Set(bGangTriggered, gang, 1, Bit_Bits(MAX_GROUPS));
					break;
				}
			}
		}
		else
		{
			YSI_g_sPlayerZone[playerid] = NO_ZONE;
		}
	}
	if (!sCheck)
	{
		static
			sLastCall;
		new
			curTime = GetTickCount(),
			timeSinceLast = curTime - sLastCall;
		for (new zoneid = 0; zoneid < MAX_ZONES; zoneid++)
		{
			if (!Zone_IsActive(zoneid) || Zone_IsProtected(zoneid)) continue;
			
			new
				owner = Zone_GetOwner(zoneid),
				attacker = Zone_GetAttacker(zoneid);
			if (attacker != ZONE_NO_ATTACKER)
			{
				if (owner != ZONE_NO_OWNER)
				{
					new
						captime = YSI_g_sGangTimes[zoneid][attacker],
						deftime = YSI_g_sGangTimes[zoneid][owner],
						attackers = YSI_g_sGangCounts[zoneid][attacker],
						defenders = YSI_g_sGangCounts[zoneid][owner];
					captime -= Zone_CalculateElapse(attackers, timeSinceLast);
					captime += Zone_CalculateElapse(defenders + 1, timeSinceLast);
					deftime = ZONE_CAPTURE_TIME - captime;
					if (captime <= 0)
					{
						Zone_SetOwner(zoneid, attacker);
						continue;
					}
					else if (deftime <= 0)
					{
						Zone_CancelCapture(zoneid);
						continue;
					}
					YSI_g_sGangTimes[zoneid][attacker] = captime;
					YSI_g_sGangTimes[zoneid][owner] = deftime;
				}
				else
				{
					Zone_SetOwner(zoneid, attacker);
				}
			}
			else
			{
				for (new gangid = 0; gangid < MAX_GROUPS; gangid++)
				{
					if (Bit_GetBit(bGangTriggered, gangid))
					{
						new
							val = YSI_g_sGangCounts[zoneid][gangid];
						if (gangid != owner)
						{
							if (val)
							{
								if (val > 1)
								{
									YSI_g_sGangTimes[zoneid][gangid] -= Zone_CalculateElapse(val, timeSinceLast);
									if (YSI_g_sGangTimes[zoneid][gangid] <= 0)
									{
										Zone_StartCapture(zoneid, gangid);
										break;
									}
								}
							}
							else
							{
								YSI_g_sGangTimes[zoneid][gangid] = ZONE_TRIGGER_TIME;
							}
						}
					}
					else
					{
						YSI_g_sGangTimes[zoneid][gangid] = ZONE_TRIGGER_TIME;
					}
				}
			}
		}
		sLastCall = curTime;
		sCheck = ZONE_LOOP_GRANULARITY;
	}
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_StartCapture
Params:
	zoneid - Zone to start capturing.
	attackers - Group attacking.
Return:
	-
Notes:
	Starts a gang war for a zone between the current owners and attackers.
-*----------------------------------------------------------------------------*/

static Zone_StartCapture(zoneid, attackers)
{
	YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] &= ~e_ZONE_FLAGS_ATTACK;
	YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] |= e_ZONE_FLAGS:(attackers << 14) & e_ZONE_FLAGS_ATTACK;
	new
		flash = Group_GetColour(attackers) & 0xFFFFFF00;
	flash |= 0x33;
	GangZoneFlashForAll(Zone_GetGangZone(zoneid), flash);
	YSI_g_sGangTimes[zoneid][attackers] = ZONE_CAPTURE_TIME / 2;
	new
		owner = Zone_GetOwner(zoneid);
	if (owner != ZONE_NO_OWNER) YSI_g_sGangTimes[zoneid][owner] = ZONE_CAPTURE_TIME / 2;
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_CancelCapture
Params:
	zoneid - Zone to cancel war in.
Return:
	-
Notes:
	Basically a loss for the attackers.
-*----------------------------------------------------------------------------*/

static Zone_CancelCapture(zoneid)
{
	new
		attackers = Zone_GetAttacker(zoneid);
	if (attackers != ZONE_NO_ATTACKER)
	{
		YSI_g_sGangTimes[zoneid][attackers] = ZONE_TRIGGER_TIME;
	}
	YSI_g_sGangZones[zoneid][E_ZONE_DATA_FLAGS] |= e_ZONE_FLAGS_ATTACK;
	GangZoneStopFlashForAll(Zone_GetGangZone(zoneid));
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_OnPlayerJoinGroup
Params:
	playerid - Player who joined a group.
	group - Group they joined.
Return:
	-
Notes:
	Updates team statuses if a player's new group is a zone capturing group.
	Also called when groups are modified.
-*----------------------------------------------------------------------------*/

stock Zone_OnPlayerJoinGroup(playerid, group)
{
	new
		zone = YSI_g_sPlayerZone[playerid];
	if (zone != NO_ZONE)
	{
		new
			gang = Group_GetGangGroup(playerid);
		if (gang == group)
		{
			gang = Group_GetGangGroup(playerid, group + 1);
			if (gang != -1)
			{
				YSI_g_sGangCounts[zone][gang]--;
			}
			YSI_g_sGangCounts[zone][group]++;
		}
	}
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_OnPlayerLeaveGroup
Params:
	playerid - Player who left a group.
	group - Group they left.
Return:
	-
Notes:
	Updates zone statuses if the group a player left was a zone taking group.
	Also called when groups are modified.
-*----------------------------------------------------------------------------*/

stock Zone_OnPlayerLeaveGroup(playerid, group)
{
	new
		zone = YSI_g_sPlayerZone[playerid];
	if (zone != NO_ZONE)
	{
		new
			gang = Group_GetGangGroup(playerid);
		if (gang == group)
		{
			gang = Group_GetGangGroup(playerid, group + 1);
			if (gang != -1)
			{
				YSI_g_sGangCounts[zone][gang]++;
			}
			YSI_g_sGangCounts[zone][group]--;
		}
	}
}

/*----------------------------------------------------------------------------*-
Function:
	Zone_GetPlayerZone
Params:
	playerid - Player to get zone of.
Return:
	Player's zone.
Notes:
	-
-*----------------------------------------------------------------------------*/

stock Zone_GetPlayerZone(playerid)
{
	if (playerid >= 0 && playerid < MAX_PLAYERS) return YSI_g_sPlayerZone[playerid];
	return NO_ZONE;
}